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sept. 25,1923. 1,468,794

J. E. BLODGETT GEAR CONSTRUCTI 0N File sept. 1a, 1922 grt/Danie@ gw t 231@ @die WMM,

autor ne q Patented Sept. 25,

narran stares saresti? cierres.

i. i i,

- JOHN E. Brionenrn-rornornnii ralissa'ciiiisnrfrs.yV

v enana ooivsrn-Uorionf;

appiiaan sied september is, fiese. `Y semi no. 538,937.

tain new and useful improvements in Gear Constructions,rof which the following isa specification.

This invention relates to gearing and has special reference to a novel gear tooth construction. j

One important object of the invention is to provide an improved form of ball yand socket gear tooth construction.y

A second important object of the invention is to provide a novel arrangement of gear tooth and gear construction wherein the wearing parts may be made of hard steel while the remainder Vof the gear is made of ordinary cast iron, or the like. Y

A. fourth important object of the invention is to provide an improved gear construction wherein the wearing parts are readily removable and replaceable.

Vith the above and other objects in view as will be hereinafter apparent, Vthe invention consists in general of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed. v

In the accompanying drawings like characters of reference indicate like parts in the several views, and

Figure 1 is a face view of a pairv of gears constructed in accordance with this invention wherein the shafts are arranged at right angles.

Figure 2 is a view of the construction shown in Figure 1 but Vat right angles thereto. Y

Figure 3 is a section on the, line 3+?) of Figure 1.

Figure 4L is asection on the line 4-4 of Figure 2. f In the embodiment of the invention herein illustrated the saine has been disclose@L as applied to what would ordinarily constitute a pair of bevel gears, that is to say, a pair of gears having driving and driven shafts at right angles. Under these circumstances, it will be obvious that the construction corresponds to the positions of the shafts but it will also be obvious from what follows, that the shafts Vmay be parallel, or

at other angles than right angles.' Y In the present construction there is shown va pair of shafts 10and-11, one of whichconstitutes a driving shaft andthe other the driven shaft.

vOn theshafit 11 is fixed a hub 12 ha ving-v a` frusto conical periphery13 provided with a series of screw threaded openings 14e ar-Y ranged perpendicularly to the periphery and radially to the axis of the shaft. Threaded into the openings 14 Vare the Vstems 15 of gear teeth, each of ,whichV has a hemi-V spherical bodyrl. f

On the Vshaft `radial stem 2O which extends through the gear center 1'? and is threaded on its eX# tremity to receive` a Vnut. 21 whereby the Vhemispherical pocket linings 19 may be drawn tightly into position in the pockets.

It is intended thaty the gear center 17 shall be made of some ordinary material and the hub 12 ofthe same material while the pocket linings 19 and hemispheres 16 are to be made of high grade tool steel or the .-lilze, or, where it is desired to eliminate friction, the pockets may be made ofsome bearing metal as for instance, a bearing bronze.- It will be noted that in the case of undue wear on any part, it is a simple matter toreinove and replace Vthat part, and that the gearsr thus formed are, for the' same number of 10 isa wheel center 17 prop Y vided with annularseries of'heinispherical pockets'l? wherein are seated hollow hemiteeth, much stronger than the ordinary bevel` y Y gears having teeth of the saine length.

There has thus been provided a simple and ei'icient device of the kind described and for the purpose specified. Y Having thus described the invention what isclaimed as new, is l 1. The combination with a gear having heinispherical projections constituting teeth,

of a second gear having aseries of spaced hemispher-ical recesses, and hollow hemi-V Yspherical linings fitting in said recesses and receiving said teeth.V K Y K 2. The combination with a gear having a hub and removable heinispherical bosses ar-V` ranged in, circular series on the huband ics constituting gear teeth; of a second gear having a circular series of recesses and relli) movable linings fitted in said recesses and With stems, each 'stein extending through a having-Yholloe7 hemispherieal interiors rerespective opening, and nuts on sind stems eevin'g said teeth. A .removably holding saidV linings n said I 3. The Combination `with e gear center pockets. 5 having a series of hemispherioal pockets, In testimon57 whereof I aflif; my signature' 15 said center 1oeing further provided with in presence of two Witnesses.

openings each extending from the bottoni of I JOHN E. BLODGETT. one of said pockets through the peripheral Witnesses: portion of the center, hollow yheinispherieal ARTHUR F. BLOCGETT,

3U linings fitted in seid pockets and provided THEODORE E. BLODGETT. 

